[英]PHP regex to match all single letters followed by numeric value in string
I'm trying to get the a regex running for the following type of strings: one upper case letter followed by a numeric value.我正在尝试为以下类型的字符串运行正则表达式:一个大写字母后跟一个数值。 The string can consist of multiple of these letter-numeric-value combinations.该字符串可以由多个这些字母-数字-值组合组成。 Here some examples and my expected output:这里有一些例子和我预期的 output:
A12B8Y9CC10
-> output [0 => 12, 1 => 8, 2 => 9] (10 is ignored, because there are two letters)
V5C8I17
-> output [0 => 5, 1 => 8, 2 => 17]
KK18II9
-> output [] (because KK and II are always two letters followed by numeric values)
I8VV22ZZ4S9U2
-> output [0 => 8, 1 => 9, 2 => 2] (VV and ZZ are ignored)
A18Z12I
-> output [0 => 18, 1 => 12] (I is ignored, because no numeric value follows)
I tried to reach this by the following regex using preg_match: /^([AZ]{1}\d{1,)$/我尝试使用 preg_match 通过以下正则表达式来达到此目的: /^([AZ]{1}\d{1,)$/
But it doesn't give the expected output.但它没有给出预期的 output。 Can you please help me, how to solve this?你能帮我吗,如何解决这个问题?
Thanks and best regards!谢谢和最好的问候!
You may use this regex in php
using preg_match_all
:您可以使用preg_match_all
在php
中使用此正则表达式:
preg_match_all('/(?<![a-zA-Z])[a-zA-Z]\K\d+/', $string, $matches);
Resulting in array $matches[0]
to return all the matches.导致数组$matches[0]
返回所有匹配项。
RegEx Details:正则表达式详细信息:
(?<![a-zA-Z])
: Make sure we don't have a letter before current position (?<![a-zA-Z])
:确保我们在当前 position 之前没有字母[a-zA-Z]
: Match a letter [a-zA-Z]
: 匹配一个字母\K
: Reset match info \K
: 重置比赛信息\d+
: Match 1+ digits \d+
:匹配 1+ 个数字Another variant could be using SKIP FAIL to skip matches that do not qualify.另一种变体可能是使用SKIP FAIL来跳过不符合条件的匹配项。
[A-Z]{2,}\d+(*SKIP)(*FAIL)|[A-Z](\d+)
Explanation解释
[AZ]{2,}\d+
Match 2 or more uppercase chars AZ and 1+ digits [AZ]{2,}\d+
匹配 2 个或多个大写字符 AZ 和 1+ 个数字(*SKIP)(*FAIL)
Use SKIP FAIL to avoid matching (*SKIP)(*FAIL)
使用 SKIP FAIL 避免匹配|
Or或者[AZ](\d+)
Match a single char AZ and capture in group 1 one or more digits [AZ](\d+)
匹配单个字符 AZ 并在第 1 组中捕获一位或多位数字Regex demo |正则表达式演示| Php demo Php 演示
The matches are the first capturing group.匹配是第一个捕获组。
$pattern = '/[A-Z]{2,}\d+(*SKIP)(*FAIL)|[A-Z](\d+)/';
preg_match_all($pattern, $string, $matches);
print_r($matches[1]);
Or with the \K
as in anubhava's answer或者在anubhava的答案中使用\K
[A-Z]{2,}\d+(*SKIP)(*FAIL)|[A-Z]\K\d+
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